test(crypto): Add a snapshot test for the inbound group session pickle

Cargo.toml

@@ -47,7 +47,7 @@ hmac = "0.12.1"
 http = "1.2.0"
 imbl = "4.0.1"
 indexmap = "2.7.1"
-insta = { version = "1.42.1", features = ["json"] }
+insta = { version = "1.42.1", features = ["json", "redactions"] }
 itertools = "0.14.0"
 js-sys = "0.3.69"
 mime = "0.3.17"

crates/matrix-sdk-crypto/src/olm/group_sessions/inbound.rs

@@ -715,6 +715,7 @@ impl TryFrom<&DecryptedForwardedRoomKeyEvent> for InboundGroupSession {
 #[cfg(test)]
 mod tests {
     use assert_matches2::assert_let;
+    use insta::assert_json_snapshot;
     use matrix_sdk_test::async_test;
     use ruma::{
         device_id, events::room::history_visibility::HistoryVisibility, owned_room_id, room_id,
@@ -741,6 +742,22 @@ mod tests {
         device_id!("ALICEDEVICE")
     }
 
+    #[async_test]
+    async fn test_pickle_snapshot() {
+        let account = Account::new(alice_id());
+        let room_id = room_id!("!test:localhost");
+        let (_, session) = account.create_group_session_pair_with_defaults(room_id).await;
+
+        let pickle = session.pickle().await;
+
+        assert_json_snapshot!(pickle, {
+            ".pickle.initial_ratchet.inner" => "[ratchet]",
+            ".pickle.signing_key" => "[signing_key]",
+            ".sender_key" => "[sender_key]",
+            ".signing_key.ed25519" => "[ed25519_key]",
+        });
+    }
+
     #[async_test]
     async fn test_can_deserialise_pickled_session_without_sender_data() {
         // Given the raw JSON for a picked inbound group session without any sender_data

crates/matrix-sdk-crypto/src/olm/group_sessions/snapshots/matrix_sdk_crypto__olm__group_sessions__inbound__tests__pickle_snapshot.snap

@@ -0,0 +1,32 @@
+---
+source: crates/matrix-sdk-crypto/src/olm/group_sessions/inbound.rs
+expression: pickle
+---
+{
+  "pickle": {
+    "initial_ratchet": {
+      "inner": "[ratchet]",
+      "counter": 0
+    },
+    "signing_key": "[signing_key]",
+    "signing_key_verified": true,
+    "config": {
+      "version": "V1"
+    }
+  },
+  "sender_key": "[sender_key]",
+  "signing_key": {
+    "ed25519": "[ed25519_key]"
+  },
+  "sender_data": {
+    "UnknownDevice": {
+      "legacy_session": false
+    }
+  },
+  "room_id": "!test:localhost",
+  "imported": false,
+  "backed_up": false,
+  "history_visibility": "shared",
+  "algorithm": "m.megolm.v1.aes-sha2",
+  "shared_history": true
+}